This doesn't usually matter because there's a weak reference; you'd
miss this if you stopped using s_logb.c though.
Change-Id: I912fceae327a378031cd24a64aefa9dfd84f7f90
long double log10l(long double a1) { return log10(a1); }
long double log1pl(long double a1) { return log1p(a1); }
long double log2l(long double a1) { return log2(a1); }
+long double logbl(long double a1) { return logb(a1); }
long double logl(long double a1) { return log(a1); }
long lrintl(long double a1) { return lrint(a1); }
long long llroundl(long double a1) { return llround(a1); }